TABLE 2 .

Genetic variability within and between clades of P. syringae^a

			Mean variability between clades
Cladeb	No. of strains	Mean variability within clade	Group 1	Group 2a	Group 2b	Group 3	Group 4	SZ030	USA102	TA003	TA002	CC1524
Group 1	16	1.45
Group 2a	23	0.79	8.71
Group 2b	38	0.92	9.13	2.81
Group 3	6	1.20	7.85	5.96	6.62
Group 4	3	0.18	8.45	8.44	8.69	8.16
SZ030	7	1.03	8.98	3.53	3.71	6.46	8.63
USA102	3	1.61	9.75	9.46	9.61	9.22	8.16	9.80
TA003	4	1.25	10.08	9.78	9.78	9.72	9.89	9.69	2.99
TA002	4	2.3	10.00	10.52	10.96	9.85	9.82	10.51	10.53	10.67
CC1524	6	1.01	10.74	11.20	11.67	10.73	11.68	11.46	11.19	11.53	7.37
UB246	2	0.60	13.74	13.89	14.17	14.13	14.88	14.07	13.02	13.78	14.28	14.21

^aVariability is expressed as the percent difference in the 1,885-base-long concatenated partial sequences of the cts, gapA, gyrB, and rpoD genes.

^bClades refer to branches on the phylogenetic tree in Fig. 1.